B22-SUB Architectural specifications The loudspeaker shall be an actively driven subwoofer housing a pair of 18" long excursion neodymium LF drivers built into a bandpass horn cabinet. The loudspeaker shall only be operated by a dedicated, compatible controller amplifier. The cabinet enclosure shall be made from marine plywood with an impact resistant paint finish. The driver shall be protected by a rigid metal grill backed by an acoustically transparent foam. The cabinet shall incorporate four handles in each side panel and four 100 mm heavy duty transport wheels at the cabinet's rear. Two runners shall be incorporated in the bottom panel and two corresponding recesses shall be incorporated in the top panel to prevent movement of stacked cabinets. The connection panel on the back shall be recessed and fitted with speakon NLT4 F/M sockets (EP5 connectors as an option). The power handling capacity shall be 1000 W RMS and 4000 W peak (10 ms). The frequency response (–5 dB) measured on axis shall be 32 Hz to 90 Hz with a maximum sound pressure of at least 143 dB. The dimensions (WxHxD) shall not exceed 1160 x 585 x 1046 mm (45.7" x 23" x 41.2") and shall weigh no more than 106 kg (234 lb). The loudspeaker shall be the B22-SUB by d&b audiotechnik GmbH.